Producing felt



RIP. PERRY.

PRODUCING FELT.

APPLICATION FILED JULY 31,1919.

1 ,352,687, Patented Sept. 14, 1920.

IDIENTOR 7 7 ATTORNEY unrra PATENT OFFICE.

RAY I. PERRY, OF UPPER MONTCLAIR, NEW JERSEY, ASSTGNOR TO THE BARRETT COMPANY, A CORPORATION OF NEW JERSEY.

PRODUCING FELT.

Application filed July 31,

To all whom it may concern ie it known that I, RAY P. PERRY, a citizen of the United iiatates, residing at .22 Parkside, Upper Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Producing Felt, of which the following is a specification.

This invention relates to dry felt and a method of and apparatus for producing dry felt from which samples can be obtained for testing or other purposes without causing a large loss of material.

It is Well known that in the making of dry felt on the ordinary paper-making machine the felt is apt to vary from moment to moment, due to various causes, thus resulting in a product that lacks uniformity. For this reason it is important to obtain samples from different portions of a roll of such material for the purpose of examining or testing the same. The taking of such samples results in the loss of a considerable amount of material as holes are left in the sheet where the samples are taken out.

This invention overcomes this objection by enabling the user to obtain representative samples while leaving the sheet intact. This is accomplished by making predetermined portions of the sheet wider than its regular width and taking the samples a short distance from the edge of the widened portions so as not to interfere with the main or body portion of the sheet.

In the usual manufacture of felt on a foraminous cylinder paper-making machine the edges of the sheet taper off in thickness and are apt to be somewhat irregular so that it is necessary to make the sheet of extra width and trim off the two edges in order to obtain a substantially uniform product of proper width. A sample taken not too close to the raw edge is fairly representative of that portion of the sheet. By this invention sheets may be produced from which samples may be obtained sufficiently far from the raw edge to indicate the quality concerning which information is desired, without cutting into the regular width of the sheet, and without trimming off a wlder strip along the edge of the sheet than is ordinarily trimmed off.

For the sake of clearness the invention will be described in connection with a paper or felt making machine which has a fo- Specification of Letters Patent.

deckle 4 wider than the" remainder.

Patented Sept. 14, 1920;

1919. Serial No. 314,587.

connection with the description, in which- Figure 1 is an end view of a ing machine partly in section; v

Fig. 2 is a side view of the machine, and

Fig. 3 is a plan view of a section of the felt shown on an enlarged scale.

In the drawings, reference character 1 represents the vat of a paper-making machine in which is mounted the foraminous cylinder 2 having the deckles 3 and 1 between which the sheet 5 is formed in the ordinary way by the water from the paper plup 6 escaping through the perforations to the interior of the cylinder 1 from which it is withdrawn, while the fibers are felted or matted into a sheet 5 on the outside surface of the foraniinous cylinder 1 which sheet 5 is picked a p by the wet blanket 7 as it passes under the couch roll 8. A suction box is shown at 9 which removes the surplus water from the sheet 5 after which the sheet may pass to squeeze rolls and drying rolls, not shown.

. The deckle 4 has an offset or recessed portion 10 as shown so that the sheet will be formed with portions 10' corresponding to the offset or recessed portion 10 of the A widened portion 10 will be formed for each revolution of the cylinder 2. In practice it has been found that a width of about two inches and length about six inches produces satisfactory results though this invention is not limited to a particular depth or shape of the offset portions 10.

Referring now to Fig. 3, the lines 11 and 12 represent lines along which the sheet 5 is to be trimmed in order to discard the side strips which are apt to be thinner and more irregular than the sheet proper. The strip trimmed off along the line 11 will have portions 13 that are some distance from the outside edge ofthe sheet 5 as formed onthe cylinderQ. These portions 13 are, there fore, of practically the same thickness and quality as the sheet itself and can be-safely taken as a representative sample of said sheet. It is advisable in many casesto make papcr-mak v the offset portion 10 of the deckle 4 of such CPI depth that samples 13 can be obtained at a distance of about two inches from the outer edge of the rough sheet. It is obvious that samples can be obtained in this way Without encroaching upon the sheet that is to be used, thus saving material. The samples 13 will be taken from the edge of the cut of! strip that was contiguous to the line 11, as the other ed e of the strip is unsuitable as a sample. lhe samples so obtained may be saturated and the quantity of satu rant they take noted for the purpose of ascertaining the saturating quality of the sheet itself. Other tests may also be made on the samples to determine other characteristics of the sheet, if desired.

Claims:

1. As a new article of manufacture, a sheet of untrimmed felt having lateral extensions thereon.

2. As a new article of manufacture, a sheet of untrimmed felt having predetermined lateral extensions thereon, portions of said extensions being of substantially the same nature as the main body of the sheet.

3. The herein described process which comprises forming portions of a sheet of felt wider than the remainder of said sheet and taking a sample from said widened portion.

(l. The herein described process which comprises formingportions of a sheet of felt-Wider than the remainder of said sheet, trimming the edges from said sheet in straight lines, and taking samples from the widened. portions of the strips near the strai ht edge of the same.

5. In the process of sampling sheets of felt, the steps which consist in making portions of the sheets wider than the remainder and cutting samples from the widened portions.

- 6. The herein described process which comprises forming sheets of felt having laterally extending portions by providing an extension of the paper-making surface of the screen in a paper-making machine.

7. In a paper-making machine, a deckle having a recessed portion therein.

8. In an apparatus of the class described, a sheet forming screen having deckles along the edges thereof, one of said deckles being recessed.

9. In an apparatus of the class described, a sheet forming screen having a small portion thereof extending laterally beyond the normal edge of said screen.

10. In an apparatus of the class described, a sheet forming screen having deckles along the edgesthereof, one of said deckles bein recessed to a depth of about two inches an length about six inches.

11; In a cylindrical paper-making ma-- chine a'deckle having a recess along its inner edge.

In testimony whereof I aflix my signature.

RAY P. PERRY. 

